Corner joint for plastic windows



FIG. 1 is a perspective view of a corner joint for plastic windowsembodying my new design.

FIG. 2 is a front elevational view thereof.

FIG. 3 is a right side elevational view thereof.

FIG. 4 is a top view thereof.

FIG. 5 is a bottom view thereof.

The ornamental design for a corner joint for plastic windows,substantially as shown and described.